Thrombectomy treatment system

Patent metadata

Field	Value
Publication number	US-12004803-B2
Application number	US-202117249808-A
Country	US
Kind code	B2
Filing date	Mar 15, 2021
Priority date	Mar 15, 2021
Publication date	Jun 11, 2024
Grant date	Jun 11, 2024

Abstract

A medical treatment device is disclosed herein. In one example, the medical treatment device includes a core assembly which has a first conduct and a second conductor. An insulative material can surround the second conductor and define an electrode portion of the second conductor that is uncovered by the insulative material. The medical treatment device can include an interventional element that electrical couples to the first conductor. The electrode portion of the second conductor can be disposed radially adjacent to or distal of the interventional element.

First claim

The invention claimed is:

1. A medical device comprising:
a core assembly configured to be advanced within a corporeal lumen, the core assembly comprising:
a first conductor having a proximal end portion and a distal end portion, the first conductor forming a lumen;
a second conductor at least partially disposed within the lumen of the first conductor, the second conductor having a proximal end portion and a distal end portion; and
an insulative material surrounding the second conductor along at least a part of its length, the insulative material defining an electrode portion of the second conductor that is uncovered by the insulative material; and

an interventional element comprising an expandable mesh forming a longitudinally open tube with a free distal end portion and a proximal end portion that tapers proximally and is coupled to the distal end portion of the first conductor, the interventional element extending distally away from the distal end portion of the first conductor, the interventional element electrically coupled to the first conductor,
wherein the second conductor extends at least partially through the longitudinally open tube of the interventional element such that the electrode portion of the second conductor is disposed radially adjacent to or distal of the interventional element.

2. The medical device of claim 1 , wherein the core assembly comprises a distally located joining element that connects the interventional element proximal end portion to the distal end portion of the first conductor, the joining element having an opening therein, and wherein the second conductor extends through the opening.

3. The medical device of claim 1 , wherein the electrode portion comprises a plurality of openings in the insulative material, the openings being spaced apart along the length of the electrode portion.

4. The medical device of claim 3 , wherein the plurality of openings are located at substantially the same angular position about a longitudinal axis of the second conductor.

5. The medical device of claim 1 , wherein the electrode portion of the second conductor comprises a first material, wherein the interventional element comprises a second material disposed on an outer surface of the interventional element, and wherein the first material is the same as the second material.

6. The medical device of claim 1 , wherein the interventional element comprises an electrode surface having a first material, wherein the electrode portion of the second conductor comprises a second material, and wherein the first material is the same as the second material.

7. The medical device of claim 1 , wherein the interventional element comprises a plurality of struts that are bounded to form a cell opening, the electrode portion of the second conductor being positioned radially adjacent to the cell opening.

8. The medical device of claim 1 , wherein the electrode portion of the second conductor is configured to be oriented to face radially away from a portion of the interventional element that is nearest the electrode portion.

9. The medical device of claim 1 , wherein the interventional element comprises a plurality of struts, the electrode portion of the second conductor being oriented to face away from the plurality of struts.

10. A medical device comprising:
an elongated shaft having a proximal portion configured to be electrically coupled to a current generator, an intermediate portion covered with an insulative material, and a distal portion defining an electrode portion;
an elongated tubular member having a proximal portion configured to be electrically coupled to a current generator, a distal portion, and a lumen receiving the elongated shaft therethrough; and
an interventional element having a proximal end portion coupled to the distal portion of the elongated tubular member, the interventional element comprising a tubular body extending circumferentially around the distal portion of the elongated shaft.

11. The medical device of claim 10 , wherein the interventional element is electrically coupled to the elongated tubular member.

12. The medical device of claim 10 , wherein the electrode portion comprises an uninsulated portion of the elongated shaft.

13. The medical device of claim 10 , wherein the elongated tubular member and the elongated shaft are non-slidably coupled together.

14. The medical device of claim 10 , wherein the elongated tubular member comprises a distally located joining element that connects the interventional element proximal end portion to the distal portion of the elongated tubular member, the joining element having an opening therein, wherein the elongated shaft extends through the opening, and wherein the interventional element comprises a proximally located attachment element that extends through the opening.

15. The medical device of claim 14 , wherein the proximally located attachment element interlocks with the distally located joining element, and wherein the elongated shaft retains the proximally located attachment element within the opening.

16. A medical device comprising:
a first conductor having a proximal end portion and a distal end portion configured to be positioned proximate a thrombus within a lumen of a blood vessel at a treatment site;
an interventional element comprising an expandable mesh defining a lumen therethrough, the interventional element having a proximal end portion coupled to the distal end portion of the first conductor, the first conductor configured to convey electrical current to the interventional element;
a second conductor having a proximal end portion and a distal end portion, at least a part of the distal end portion of the second conductor extending through the lumen of the interventional element; and
an insulative material disposed over the second conductor, the insulative material configured to electrically insulate the second conductor, the insulative material defining an electrode portion on the second conductor, the second conductor and the electrode portion being configured to provide a return path for an electrical current from the interventional element.

17. The medical device of claim 16 , wherein the first conductor comprises a distally located joining element that connects the interventional element proximal end portion to the distal end portion of the conductor, the joining element having an opening therein, wherein the second conductor extends through the opening, and wherein the interventional element comprises a proximally located attachment element that extends through the opening.

18. The medical device of claim 17 , wherein the proximally located attachment element interlocks with the distally located joining element, and wherein the second conductor retains the proximally located attachment element within the opening.

19. The medical device of claim 16 , wherein the electrode portion is disposed within the lumen.

20. The medical device of claim 16 , wherein the electrode portion comprises a spiral opening in the insulative material.

21. The medical device of claim 16 , further comprising a plurality of electrode portions, wherein the plurality of electrode portions comprises a plurality of openings in the insulative material, the openings being spaced apart along the length of the electrode portion.

22. The medical device of claim 16 , further comprising a plurality of electrode portions, wherein the plurality of electrode portions comprises an uninsulated portion at the distal end port

Assignees

• Covidien Lp

Inventors

• Nageswaran Ashok
• Girdhar Gaurav
• Nguyen Hoai
• Deen Daniel

Classifications

• A61B2218/007

  Aspiration · CPC title

• A61B2218/002

  Irrigation · CPC title

• A61B2018/1266

  with DC current output · CPC title

• A61B2018/126

  bipolar · CPC title

• A61B2018/1253

  monopolar · CPC title